Event Abstract Back to Event New insights about the population structure of the blue jack mackerel (Trachurus picturatus) in the NE Atlantic using otolith stable isotope ratios Cláudia Moreira1, Elsa Froufe2, Alberto Caeiro1, Alcides Sial3 and Alberto T. Correia1, 4* 1 Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Ecophysiology, Portugal 2 Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Aquatic Ecology and Evolution, Portugal 3 NEG-LABISE, Universidade Federal de Pernambuco,, Geology, Brazil 4 Faculdade de Ciências da Saúde da Universidade Fernando Pessoa (FCS/UFP), Portugal The blue jack mackerel Trachurus picturatus is a pelagic fish widely distributed in the NE Atlantic and also found in the Mediterranean and Black Seas. It is an economically important resource in the Macaronesian islands of Azores, Madeira and Canaries, but despite its fishery value and ecological importance, fluctuations in the landings are difficult to explain since studies regarding the population dynamics, stocks structure, fish movements and habitat connectivity are inexistent. The populations of marine pelagic fishes, in particular the migratory ones, such as T. picturatus,, may be erroneously considered an homogenous population unit because they show broad geographic distributions, large population sizes and high migratory movements. Stable isotope ratios, namely δ18O and δ13C, measured by standard mass spectrometric techniques in whole otolith samples of T. picturatus adults sampled in the fishery grounds of the Islands of Azores, Madeira and Canaries, and at the Portuguese mainland (Matosinhos, Peniche and Portimão) during the spring-summer of 2013 were analysed. The 18O signatures followed the general tendency taking into account the seawater temperatures of the sampling regions. 13C signatures showed however differences between the oceanic or continental origin of the fish. Both variables provided location-specific signatures. Further studies including mitochondrial and nuclear DNA studies are also been conducted to acquire new knowledge for fisheries conservation purposes. Keywords: Blue jack mackerel, Trachurus picturatus, otoliths, NE Atlantic, Stock(s), δ18O and δ13C Conference: XV European Congress of Ichthyology, Porto, Portugal, 7 Sep - 11 Sep, 2015. Presentation Type: Oral Presentation Topic: Otoliths as a tool to study fish life cycles Citation: Moreira C, Froufe E, Caeiro A, Sial A and Correia AT (2015). New insights about the population structure of the blue jack mackerel (Trachurus picturatus) in the NE Atlantic using otolith stable isotope ratios. Front. Mar. Sci. Conference Abstract: XV European Congress of Ichthyology. doi: 10.3389/conf.fmars.2015.03.00046 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 05 Nov 2015; Published Online: 09 Nov 2015. * Correspondence: Prof. Alberto T Correia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Ecophysiology, Porto, Porto, 4050-123, Portugal, atcorreia.ciimar@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Cláudia Moreira Elsa Froufe Alberto Caeiro Alcides Sial Alberto T Correia Google Cláudia Moreira Elsa Froufe Alberto Caeiro Alcides Sial Alberto T Correia Google Scholar Cláudia Moreira Elsa Froufe Alberto Caeiro Alcides Sial Alberto T Correia PubMed Cláudia Moreira Elsa Froufe Alberto Caeiro Alcides Sial Alberto T Correia Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.